Tropical Storm Harvey Causes Unprecedented Rains in Southeastern Texas

South Korean environmental activists wearing black cloth perform to represent the burning Earth during a protest marking a global climate action day in Seoul.

Flooded downtown is seen from a high rise along Buffalo Bayou after Hurricane Harvey inundated the Texas Gulf coast with rain causing widespread flooding, in Houston, Texas, Aug. 27, 2017, in this picture obtained from social media.

Two people walk down a flooded section of Interstate 610 in floodwaters from Tropical Storm Harvey, Aug. 27, 2017, in Houston, Texas.

Interstate highway 45 is submerged from the effects of Hurricane Harvey seen during widespread flooding in Houston, Texas, Aug. 27, 2017.

Residents wade through floodwaters from Tropical Storm Harvey, Aug. 27, 2017, in Houston, Texas.

Interstate highway 45 is submerged from the effects of Hurricane Harvey seen during widespread flooding in Houston, Texas, Aug. 27, 2017.

A rescue worker carries two dogs to safety after evacuating their family from floodwaters from Tropical Storm Harvey Sunday, Aug. 27, 2017, in Houston, Texas.

A driver works his way through a maze of fallen utility poles damaged in the wake of Hurricane Harvey, Aug. 26, 2017, in Taft, Texas.

A car is surrounded by floodwaters from Hurricane Harvey in Point Comfort, Texas, Aug. 26, 2017.

A condominium complex is reduced to rubble after Hurricane Harvey struck in Rockport, Texas, Aug. 26, 2017.

A plane lies upside down at the airport after Hurricane Harvey struck near Fulton, Texas, Aug. 26, 2017.

A home damaged by Hurricane Harvey remains surrounded by flood waters, Aug. 26, 2017, in Rockport, Texas.

Cars sit abandoned at a flooded gas station after Hurricane Harvey made landfall on the Texas Gulf coast and brought heavy rain to the region, in Houston, Aug. 26, 2017.

Lisa Rehr holds her four-year-old son Maximus, after they lost their home to Hurricane Harvey, as they await to be evacuated from Rockport, Texas, Aug. 26, 2017.